Hzemoglobin chart



A. FEINBERG ,HEMQGLOBIN CHART Fild April 21, 1928 lllillu:

` HLM@ 94A-Mw? AQMM w'ventoz r Patented `luly 1, 193() ALFRED FEI-NBNRG,on NEW YORK, N. Y., AssIGNon 'rov Tran EQUITY rnnss, INC., 0F i NEWYORK, N. Y., .a coaronarroN or NEW YORK HEM'OGLO'BN CHARTApplicationgled April 21,

' rlhis invention relates to blood testing apparatus and With respect toits more specilic 'features to an apparatus Wherewith the percentagestrength of the blood in haemoglobin ,a may be estimated in a visualmanner as by comparison of a blood sample with diilerent.

test colors, the'ditlerent test colors being indicative of knowndifferent percentages ot haemoglobin in a blood sample ot'correspondla'ing color. Y

y One ofthe objects of the invention is the provision of a practicalapparatus for testing blood ior haemoglobin, which apparatus is of Ysimple construction. and is adapted for making' a great number ofdiiferent tests even when made of relatively small size.

Another object is the provision of an etiicient apparatus for thepurpose, Which apparatus is self contained and by means of which thetest is quickly performed in an accurate manner.

Another object is the provision of such an apparatus in Which the colorscale, or color chart/automatically, so tospeak, is main- .25 tained inthe most eective .color comparable relation to the part thereof Whichcarries the blood sample, or blood stain. Y

Other objects of the invention will be in part obvious and will in partappear here 3Q inafter.

Q taken in connection with the accompanying drawing, iu Which: t

Fig. l is a plan view of an apparatus embodying the invention; Y

Fig. 2 is a central vertical section Vof Fig. 1; Fig. 3 is a like viewofthe apparatus, but with the carrier leaves and color chart spaced fromeach other for clearer disclosure oi. the different parts; Fig. 4l is aplan View of the colorchart. Referring now more specically to the 192e.serial No. 271,728.

drawing, the numeral l indicates the vcolor chart, or color scale, andthe numeral 2 generally indicates the stain carrier. The stain carriermay consist oione or several carrier leaves. ln the present embodimentthe stain carrier is composed of a plurality of stain carrier leaves,each of which is indicatedby the numeral 3, the leaves 3 being insuperposcd relation to each other so as to form a pack of carrierleaves. The stain carrier leaves may be of paper, and such paper shouldhave good blood absorbent quality and is preferably dead white. A goodquality filter paper would serve although other blood absorbent sheetmaterial may be used.

The color chart l is provided with a. line. or" test colors e, 5, 6,7,8, 9 and 10, these colors respectively corresponding in ycolor to bloodstains from blood having diierent known percentages of haemoglobincontent. For instance, seven diiferent test colors are found in thechart, the color l0 indicating that a blood stain corresponding in colorthereto has a normal or 100% hzemoglobin content. Similarly the color 9indicates haemoglobin content of 90% the color 4 indicates content of10%, and so on.

In the present embodimentV the chart l is circular, and the line oftestl colors extends peripherally of the chart, each color coming to theouter edge of the chart. By arranging the colors in this circular seriesit is possible to make the chart ot relatively small diarin eter so thatall the colors are viewable to gether and simultaneously even when theobf servers eyes are but a short distance from the chart. By thusvievvin g the test colors together and all at once, shade and colordifierences between them are better delined for the observer. Also thesample blood stain on the carrier will be close to the edge of the chartand viewable simultaneously with the test colors, enabling the observerquickly to compare the stain with the chart With better appreciation or"minute diiierence in shade or color. By making each test color a sectorof Y the color chart, each is nevertheless of consid-` erable areav sothat color comparison is facilitated, notwithstanding the chart may besmall, as explained.

The color chart and the stain carrier are shjftable relative to eachother serially of the n Ime of test colors, so that a blood stain on thecarrier, for instance as indicated at 11, may be dis osed directlyopposite any of the colors o the chart. As illustrated the color chart 1is in superposed relation to the stain carrier 2, the two bein thusassembled for nelativeshift. Prefera ly the shift is a rotatveone in aplane parallel to that of the leaves of the carrier. 'To this end thecolor chart and carrier leaves are connected by a pin or pivot 12 whichpasses through the centre of t e color chart and of the carrier leaves,the connection thus lying within the edges o'f the chart and leaves,leaving the edges free to be grasped for manipulation and turnin Ifdesired, the chart alone may be the slnftable element, the carrierleaves being restrained from shifting.

ingltherebetween the stain carrier is exposed an,

is retained in stain compariner relation to the chart. In the presentembbodiment these results are secured by having the outer edge of thecolor chart lie within the outer margin of the pack of carrier leaves,so that the stain-receiving margin 13 of the leaves rojects aconsiderable distance outwardly litem the edge of the chart, and isvisible alongside the chart at all points of the periphery of thelatter. In this wise the size o margin 13 may be selected as desired,without interfering with the operation or position of the chart 1.

As hereinbefore explained, the carrier is preferably composed of a packof relatively superposed carrier leaves 3, each adapted to receive thestain of the blood sample to be tested. The color chart 1 may rest onthe upper carrier leaf 3 so as to be supported by the pack and so as toexpose the marginal face 13 of the upper carrier leaf. When the uppercarrier leaf has been stained and uti- Iized, it may readily be detachedfrom the peck, as by being torn from the pin 12, thus exposing the nextunderlying carrier leaf. By using a suitable connection 12, as forinstance a smooth pin, or the like, the chart 1 may move or be pressedinto contact with the upper face of said next underlying leaf of thepack and thus automatically, as it were, come to comparison positionrelative to said underlying carrier leaf.

In the present embodiment stain stops are interposed between adjacent ofthe carrier leaves 3 to prevent staining of an underlying carrier leafby a stained leaf lying thereabove. The stain stops are indicated at 14,and they alternate in the pack with the carrier leaves. The stain stopsmay be circular leaves similar in diameter to the carrier leaves. In thepresent instance the stop leaves are made of thin paper impermeable tothe stain. Or they may be of paper impregnated or otherwlse treated toserve the same purpose.

The numeral indicates a holder for the assembled color chart 1 and packof carrier leaves. In this embodiment the holder 15 is a sheet ofrelatively stiff paper, as cardboard, and the chart and carrier are heldon the holder by the pin 12 which passes through the latter. The holder15 is white in color and being relatively thick serves to restrict lightbeing transmitted therethrough to the carrier leaves opposite the stainreceiving margin 13 of the latter leaves. The several test colors may bemarked with the percentages hereinbefore mentioned, as illustrated at16.

In operation the observer applies the blood sample to the uppermostcarrier leaf 3 at its margin 13 close alongside the edge 17 of the colorchart. Thereupon he shifts the chart and stained carrier leaf relativeto each other to bring the stain close to the several colors, thehaemoglobin content of the sample being indicated either exactly orapproximately by the color with which it most closely agrees.

The entire line of test colors is visible simuly taneously with thestain when thc chart is small, so that comparison is quickly andaccurately effected. Transmitted light is largely cut off by underlyingcarrier leaves, their eliminating effect being augmented by thecardboard holder. Having used the upper carrier leaf, it is readily tornoff, whereupon the apparatus is at oncein condition for another test. I

The test colors on the chart may be the same as those of the haemoglobinscale devised by Tallquist, being various tones of red running from deepred or normal blood color through the lighter shades, as is well known.

Since certain changes may be made in the above construction anddifferent embodiments of the invention could be made without departingfrom the scope thereof, it is intended that all matter contained in theabove description or shown in the accompanying drawing vshall beinterpreted as illustrative and not in a limiting sense.

Having described my invention, what I claim as new and desire to secureby Letters Patent is:

1. A haemoglobin test apparatus having, in combination, a color chartand a stain carrier connected together and one shiftable relative to theother serially of the line of test colors on the chart, the carriercomprising a pack of relatively superposed detachable carrier leaves thetopmost of which is retained in stain compa-ring relation during theserial shift between said carrier and chart.

2. A haemoglobin test apparatus having, in combination, a pack ofrelatively superposed carrier leaves, a color chart superlao posed onsaid pack and lying Within the outer margins of the leaves of said pack,the line of colors extending peripherally of the chart, said chart andleaves operatively connected Within their edges for relative shiftmovement therebetween.

3. A haemoglobin test apparatus having, in combination, a pack ofrelatively superposed carrier-leaves, a color chart superposed on saidpack and lying Within the outer margins of the leaves of said pack, theline of colors extending peripherally of the chart, said chart andleaves operatively connected Within their edges for relative rotativeshift movement therebetween.

fl. A haemoglobin test apparatus having, in combination, a color chartand a stain carrier connected together and one shiftable relative to theother serially of the line of test colors on the chart, the carriercomprising a pack of detachable carrier leaves each of which is retainedin stain comparing relation during the serial shift between said carrierand chart, and stain stops between said lea-ves.

5. A haemoglobin test apparatus comprising, in combination, a pack oflea-ves and a color chart supported on, and so as to expose the upperleaf of said pack, and means so connecting said chart to said leavesthat detachment of a leaf next said chart permits said chart to moveinto contact with the next underlying attached leaf of the pack.

6. A haemoglobin test apparatus compris ing, in combination, a pack ofleaves and a color chart supported on, and so as to eX- pose the upperleaf of said pack, and means so connecting said chart to said leavesthat detachment of a leaf next said chart permits said chart to moveinto Contact with the next underlying attached leaf of the pack, saidpack comprising alternate stain carrier leaves and stain stop leaves.

7. A haemoglobin test apparatus comprising, in combination, a staincarrier and a color chart superposed on said carrier and exposing itsmargin, said chart having a circular series of haemoglobin test colors,said chart and carrier rotatively shiftable relat-ive to each other,While maintaining color comparing relation to each other.

In testimony whereof I aiix my signature.

ALFRED FEINBERG.

